<hyc> no dynamically loaded modules; dynamic linkage is a 5% overhead all on its own - isnt that just for load time, if its already in the memory it shouldnot make difference

no.

calling functions from dynamically loaded modules can be slower

They can use intermediate JMP instructions, like DLL import tables in Windows do

hmmm so xmrig for example is statically linked binary in their site ?

but once you called a function in a DLL, the speed of the function itself is the same

We're talking about <0.1% difference when it comes to mining

mhmh that makes sense

all references to global symbols go thru an indirect table

that's a quirk of the way dynamic linking was designed, which allows other symbols to be interposed at any time.

it only makes a difference if you're calling DLL functions thousands of times every second

then static linking can speed up things

strings xmrig | grep GCC

built on Jul 3 2023 with GCC

GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609

wouldn't modern gcc improve smt ?

RandomX is 99% assembly code, there's nothing for compiler to do there

Except for transating it to machine code